Surprisingly, sleep quantity is NOT the most important factor of sleep to improve mental health, especially for young adults
The researchers, based out of New Zealand, conducted an online survey to investigate “the associations between sleep, physical activity, and dietary factors as predictors of mental health and well-being in young adults.” They found that sleep quality “significantly outranked” sleep quantity in predicting a person’s mental health and overall well-being.Specifically, people who reported higher quality sleep were significantly less likely to experience depressive symptoms. Such a “robust” correlation remained even after researchers controlled for confounding factors. One possible limitation of this study is the “non-validated” way the researchers assessed sleep quality. That is, the researchers asked respondents to rate how refreshed they felt on a scale of 0 (never refreshed) to 4 (very refreshed) when they wake up in the morning instead of actually evaluating biological or physiological evidence for sleep quality (which can be done during something like a scientific sleep study).
However, the researchers do cite in their paper earlier evidence suggesting that feeling refreshed after rest can be an indicator of high-quality sleep, so if we agree on this premise – and trust the validity of these self-reported measurements – then the results likely still offer some important insights.
Here Are the Top Five Things That Ruin Your Sleep Quality
Go ahead, ask yourself:Do you feel refreshed when you wake up in the morning? If you use an alarm, do you wake up a minute or two before the alarm goes off feeling ready to get out of bed to start your day, or do you hit the snooze button? Do you feel fatigued and foggy-brained during the day, even if you get the recommended eight hours of sleep per night?
- Substances (especially if consumed close to bedtime) including caffeine, alcohol, and certain medications like antidepressants or beta-blockers
- Late-night exposure to bright lights, and especially blue light from digital devices
- Stress
- Lack of physical activity during the day
- A bedroom temperature that’s too high (for better sleep, try setting the temperature to around 63 to 68 degrees Fahrenheit)